Drill-bit holder.



" "No. 357.151. 1PATENTED- JUNE 18, 1907 U. s. BOOTH.

DRILL BIT HOLDER. APPLICATION FILED PEB.B6,1907.

.. Tdall whom it concern.-

Beit known that I, ULYSSES S1LAs Boo'rn,

" STATES:

,ULYSSES" SlLAS-BOOTH, OFPORTLAND, 'QREG N, ASSIGNOR TO THE' CHAM- PATENT OFFICE.

i PION BLOWER & roses COMPANY,- OF LANCASTER, PENNSYLVANIA, A

CORPORATION or PENNSYLVANIA. a

DRILL-BIT HOLDER.

a-citizen' of the United States, residing at Portland, in the county'of Multnomah and State of Oregon, have invented certain new and useful 'Im rovements in Drill-Bit Hold-. I ers and I do ereby declare the following to be a full, clear,iand exact description of the invention, such aswill enable others skilled in the art to which it appertains to make and use the same. i

This invention relates to machines,

andxmore particularly-to drill-bit holders or means forfastening'the shank of a drill-bit or similar tool to a drill spindle or chuck in;

. such manner aszto prevent the bit or tool from turning,- slipping or becoming loose and dro ping out.

e invention will first be hereinafter more particularly described, with reference to the accompanying drawings, which are to be taken as a part ofthis specification, and then pointed out "in the claims at the end of the description.

In said drawings, Figure 1 represents a front elevation of a drill spindle-having a' chuck or socketed'head on its lower end embodying' my invention; Fig. 2 is'a longitudinal sectional elevation of the chuck or drill-bit holder on the lower end of a drill spindle having an auxiliary chuck or drill-bit holder attached thereto and illustrating another. application of my invention. Fig. 3 isaperspective sectional view of the auxiliary chuck or drill-bit holder; and 4 is a front elevationiof said auxiliary chuck detached from the drill spindle.

a straight (piece of cold. rolled shafting, of any desire length and diameter, adapted for connection with the co-operating parts of a machine by havin its upper end threadedand a longitudina groove or key-way therein extending the greater part of its length, and provided at its lower end with an enlarged head or chuck A a in which a drill bit or other .tool is secured; said head referably consjs of cast or wrought iron, which may ble sirunk on the end of the drill spindle, and longitudinally bored or Specification of Letters Patent.

Application filed February 26, 1907. Serial Ho.859.444;

so'cketed as at a. to receive the shank of a drill-bit or other tool and also tapped as at 'a/ for the insertion of a set screw toengagethe.

shank of the drill-bit and preventthe same from slipping or dropping out, which is a common feature in this class of machines.

In order to prevent the drillbit from turn transverse bore, ,so as to form-a shoulder b where the two bores intersect having a fiattened surface for engagement with the flattened surface ofa semi-cylindrical end-portion-b of the shank of .a drill-bit B, whereby the latter, when properly seated within the longitudinal bore of the chuck and fastened by means of the set screw or other fastening device, will be securely locked against rotation as Wellas against endwise or longitudinal movement.

It hasheretofore been proposed to provide a chuck or tool holder with a socket which is angular in cross-section.toreceive a correspondingly shaped shank of a 'drill bit or other tool, and to secure the same within the socket by means of a set screw,'so as to prevent rotary or longitudinal movement, and

it has also been proposed to cut away the construction are objectionable as they add ofdevices above mentioned, and it has the further advantage of being inexpensive in I construction, as it is only necessary to bore or drill two holes at right angles to each other in the enlarged head or boss on the lower en chuck secured in its place; the latter having of'the drill spindle, the bore in each instance terminating part way of the bore which it intersects, thus dispensing with the nicety and exactness usually required in fitting and adapting the parts to co-operate in producing the desired result.

The letter A denotes an auxiliary chuck having its shank constructed to fit the bore of the socketed head or chuck A on the end of the 'drill spindle and take the place of a drillbit or other tool secured therein: said auxiliary chuck being provided with a longitudinal and transverse bore having a flattened portion therein as described with reference to the socketed head or chuck on the drill spindle, so as to adapt the said auxiliary chuck to receive a drill-bit or other tool secured therein in the same manner that the shank of the auxiliary chuck is itself secured to the socketed'head or chuck on said drill spindle.

By means of the auxiliary chuck I'may use on the same machine a drill-bit or other tool having a shank of larger or smaller size than the shank of the drill-bit or other tool which is ordinarily used with such machine; the shank of the auxiliary chuck bein adapted to fit interchangeably with the s ank of the drill-bit which .is' ordinarily employed on agiven machine. For instance, if the chuck on the drill spindle is not of standard size and the shank'of the drill-bit is adapted to fit an opening or bore'which is only one-half inch in diameter, and the operator desires to use a drill-bit having a shank which is 5/8 of an inch or 41 /64 of an inch in diameter, the drillbit may be removed from the chuck on the drill spindle and the shank of the auxiliary a socket or bore adapted to receive the de- I sired size of drill-bit of greater or less diame- -ferent sizes with the same drill spindle.

ter, as the case may be, than the drill-bit removed from the chuck on the drill spindle, thus enabling the operator to use tools of i lif- 1e sizes may be varied, of course, to suit different requirements, the object being to provide means for attaching drill-bits of different sizes to a drill spindle of a standard size.

Having thus described my invent-ion what I claim as new and desire to secure by Letters Patent of the United States, is: v I

1. A drill-bit holder or chuck comprising a suitable head on or adapted for attachment to a drill spindle, said head having a longitudinal bore or socket and a transverse bore or'socket intersecting the former, each bore terminating part way of the bore which it intersects, so as' to provide a shoulder within the head having a flattened surface or seat for engagement with the flattened end of a drill-bit shank.

Z. A drill-bit holder or chuck comprising a suitable head on or adapted. for attachment to a drill spindle, said head having a longitudinal bore or socket and a transverse bore or socket intersecting the former, each bore terminating part way of the bore which it intersects, so as to provide a shoulder within the head having a flattened surface or seat for engagement with the flattened end of a drillbit shank, and means adapted to secure the flattened end of the shank in engagement with said seat.

In testimony whereof I afii-x my signature, in presence of two Witnesses.

ULYSSES SILAS' BOOTH.

Witnesses:

E. L. JOHNSTON, J. E. MAGERS. 

